Knitting-machine.



M. KOHLSDORF.

KNITTING MACHINE. APPLICATION FILED D110. 1s, 1912.

Patented Oct. 7, 1913.

vll.

MAX KOHLSDOK, 0F BROOKLYN, NEN YORK.

KNITTNG-MACHINE.

Specification of Letters Iatent.

radium oet. 71,1913.

Application Filed December 16, 1912. Serial No, 736,906.

To all whom, t may concern:

lle it known that I, Max Koimsnonr` residing at Brooklyn, inthe county of Kings und State of New York,` have invented certain new and useful lr-nprovements in Knitting-Machines, of which the followingy is a slmci-tcaton.

The pre-sent invention relates to knit-tim;I machines and particularly to a device for forming barrier stithes to prevent the knitted fabric from ripping open .throughout ists length7 incase one or more stitches hrcnk. Such vbarrier stitches are 'particularly required in stockings, as it frequently happens that in the upper portion of the stocking one or more stitches break, incident;v

to the use ot' gripping devices on Stockingl supporters. forming such hai-rierstitches is Complicated and entails considerable loss of time.

My invention sliihstantially consists in the con'ihination with'un ordinary knitting maf-..-

chinc, olf-a deviee cornp'isiiig a thread guide, 'which is a rranged im oppositiflin to the. knit! zing needles and is 'given sieli a movement as to feeil an auxiliary t read in form of a coil around cach knitting needle, the coil forming a barrier lit-.tween two portiol'is of the knitted taln'if as for instance, in stockings, between the upper and tower portion and preventing the ripping from extendingI from one portion of the tala-ic to tho other. lt is immaterial where, the. liarrier stili-h is formed, lint in nacticc, and inlrtif-.ularly in the inanufmft-ure, of stockings, it is pre fcrred to form the. same along; the. lower .-dfgc of the. doubled-up upper portion of thc stoel-ing M intention will be more clearly understood hy reference to the aceompany-"migl di':|.\vi|i,fF in which similar reference letters denote corresponding parts and in which# Figure l is a vertical section through the. deriveg illustratingr also a part of the knit tintr machine to which the device is iipplied; hief. L is n cross section on line 2W?. of Fig. az'hiez/l a cross section on line iisd?) of Fi". iti/i, 4, is a'detail ot crmstruction; /f/ and 'tt illustrate the method ot`.

r and lfmr opei'ritio of the device.

'ilu-devicet'oiforming thc harricr stitches comprises a 2guide n.' for an auxiliary thrend c ti les. and arranged in opposition to the knitting' needles and capable of swinging through thefspaee between two adjoin ing knitting needles and of moving crosswisc 'the hitherto used method ot'- to the .set of the i'ieet'lles. double motion this guide .te the nuttin-.ry thread c in torni of a coil around each knitting,r needle (Fig. 5) which thread is therehy caused to embrace each longitudinal thread S.

n the present enihmlii'nent ot my inren tion a denotesl e part ot the frame. of thc knitting machine, denotes the-bars for the knitting needles and l: the knitting needles'. These parts are all of ordinary construction and the needles operate in well known manner), so that a further description of the knitting inzuhine is unnecessary. The ,guide (l is in forni of warped hat', the lower end d of which provided with eyes Il? throuffh which the tlnfad c coming from a spool (not shon'nl is passed. rthe lower end d ot' a thickness; correspoiulingJ to the sparc c hetu'een tivo adjoining knitting( needles c, so that it. can 'tref-1y swing through. said space, lits lower edge. Il is curved or rounded so that .-Jhile it swings through the sparc lietween two adjoining knitting needlts; it, will not cut or even touch the threads of the fahrie. The lguide, is fixed to thc extension fot' a shaft y, which arranged parallel to and. at some distance a 'ay from the edgles of thel knitting needles. The shaft is morality horno in a easing; fm, so as to bt?, rapzihlc of moving; longitudinally and also rooien;r around longitlulinal axis. The longitudine: feeding moven'ient is effected hy means ot' a rack /i provided on the shaft, with the teeth 11.2 of which cooperate two paui's fand The. pawls i and are riivotA-.d to a spring actuated rocking arm t.' t'ul.- crumed at and carryingr a roller rz.. disk tixed on :i manually operated spindle l" is formed on itsl rirrumlerence with cam (.)u'ing to .this

- shaped projections which uct against, the' `roller lf2 nni'iarting n su'ingingr motion to thc lever 'l`hfl ram projections IUC So :ulmeasmed that hy the swinging movement of the lever It: the pawl will feed thc shaft intermittently forward a distance. equal to two knittingy needles. weight p suitably su.-:peinl :-d at. 7 from the shaft l tends to retract the shaft after each movement,

'which retraction is limited to a distance equal tothe thickness of an individual knitting needle by the second paw] j.

'lhe rocking movement of the guide rl ctl'ected throng-h the medium ot a vertically reciprocating liar n which. has longitudinal recesses n whereby it is mov-.lilly mounted on stationary projections o. This bar carries a roller n (Fig. 2) that is acted upon by the cams Z of the disk Z. At its free end this bar is formed 'with a nose n which engages a longitudinal groove l1. in

the shaft It. As thel bar through the medium of the roller n2 and the cam disk l is caused to. reciprocate the shaft IL and consequently the guide (l are given short swinging movements. n2 are so arranged relative to one another, that one will enter onto the ascending part of the cam projectionsfl earlier than the other, whereby the shaft. will first receive one and then the other movement.

The operation of the device can be effected by a handle (not shown) to be applied to the'shaft-l2 of the disk l. As this disk is revolvedv the shaftgwill be first rocked to swing the guide d through the space c seam F (Fig. 6) which acts as barrier between the lowervand upper end of the fabric.

The two 'rollers k2 and'4 toward the imparting to said guide a swinging motion' 'What I claim and desire to secure by Letters Patent is:

1. In a lmitting machine, the combination with the vknitting needles, of a device for forming barrier stitches, comprisin a guide directed toward the knitting 'nee les and adapted to feed an auxiliary thread in form of a coil around each individual knitting needle.

2. In a knitting machine; the combination with the knitting needles7 of a device for y forming barrier stitches, comprising. a

guide havin anauxiliary thread directed Enitting needles and means for.

and a motion transversely to the knitting needles, whereby the said guide will be caused to feed its thread around each individual knitting needle. `3. In a knitting machine, the combination with the knitting needles, of a device for forming barrier stitches comprising a guide having an auxiliary thread directed toward the knitting needles, a member car ing said guide, means for imparting a roc ing movement to said member and for feeding the latter transversely to said knitting needles.

' In testimony whereof I affix my signature in presence of two witnesses.

MAXA KOHLSDORF` Witnesses:

JAMES H. GOGGIN, MAX D. OnnMANN'. 

